Apparatus (1) for forming in continuous a spiral seamed conduit (5) from a metallic strip (2) comprising a feeding plane (3) for said metallic strip (2); a forming head (4,4) rotating about a forming axis (A) substantially parallel to the feeding plane (3) and tilted by a forming angle (a) with respect to a direction orthogonal (0) to a feeding direction (F) of the metallic strip, wherein the forming head (4,4) is adapted to drive in rotation said metallic strip (2) for defining a spiral conduit (5); a lock-seaming device (6) configured to lock in continuous two portions of said metallic strip (2) along opposite profiles for forming said spiral seamed conduit (5); wherein said forming head (4,4) is provided with one or more forming elements (7,9) arranged and configured so to define a substantially polygonal shape for the section of said spiral conduit (5) during the drive in rotation of said metallic strip (2); wherein said lock-seaming device (6) is configured to move along a seaming direction (G) so to lock said two portions along a side of said conduit (5); and wherein said apparatus (1) further comprises means configured to move the forming head (4,4) according to a plurality of axes. The present invention also relates to a process for forming in continuous a spiral conduit (5) having a substantially polygonal section and a spiral conduit (5) having a substantially polygonal section and four flat sides.

Apparatus (1) for forming in continuous a spiral seamed conduit (5) from a metallic strip (2) comprising a feeding plane (3) for said metallic strip (2); a forming head (4,4) rotating about a forming axis (A) substantially parallel to the feeding plane (3) and tilted by a forming angle (a) with respect to a direction orthogonal (0) to a feeding direction (F) of the metallic strip, wherein the forming head (4,4) is adapted to drive in rotation said metallic strip (2) for defining a spiral conduit (5); a lock-seaming device (6) configured to lock in continuous two portions of said metallic strip (2) along opposite profiles for forming said spiral seamed conduit (5); wherein said forming head (4,4) is provided with one or more forming elements (7,9) arranged and configured so to define a substantially polygonal shape for the section of said spiral conduit (5) during the drive in rotation of said metallic strip (2); wherein said lock-seaming device (6) is configured to move along a seaming direction (G) so to lock said two portions along a side of said conduit (5); and wherein said apparatus (1) further comprises means configured to move the forming head (4,4) according to a plurality of axes.

The present invention also relates to a process for forming in continuous a spiral conduit (5) having a substantially polygonal section and a spiral conduit (5) having a substantially polygonal section and four flat sides.

An elongate tape element (508), a flexible pipe body and method of producing a flexible pipe body are disclosed. The tape element has a cross-sectional profile comprising a body portion (510) for being positioned between collapse resistant tape windings such that each body portion lies at least partially in a gap (512) between adjacent collapse resistant tape windings (501); and at least one wing portion (516) extending from an end region of the body portion (510), the at least one wing portion (516) configured to span the gap (512) and respectively abut with a radially inner surface of an adjacent collapse resistant tape winding (501).

A machine (1) for working a ribbon-shaped element (T1, T2, T2) is described, comprising at least one cutting station (2) crossed by the ribbon-shaped element (T1, T2, T2), guiding means (3, 4) adapted to position and drag the ribbon-shaped element (T1, T2, T2) onto at least one fixed plane (PI) of the cutting station (2) keeping an edge of the ribbon-shaped element (T1, T2, T2) tangent to a fixed point (A1) of the fixed plane (Pi); at least one of the guiding means (3, 4) rests onto an arm (31) free of rotating with respect to a fixed axis (33); the fixed axis (33) is at the same distance with respect to the cutting station (2) and the at least one of the guiding means (3, 4).

An elongate tape element, a flexible pipe body and method of producing a flexible pipe body are disclosed. The tape element (508) has a cross-sectional profile comprising a body portion (510) for being positioned between collapse resistant tape windings (501) such that each body portion (510) lies at least partially in a gap (512) between adjacent collapse resistant tape windings (501); and at least one wing portion (516) extending from an end region of the body portion, the at least one wing portion configured to span the gap and respectively abut with a radially inner surface of an adjacent collapse resistant tape winding.

A method and apparatus are disclosed. The method includes the steps of providing an elongate sheet having a uniform thickness and a first and further spaced apart long edge, to a first pair of a plurality of spaced apart pairs of opposed forming roller elements, and via the pairs of roller elements, progressively forming a cross-sectional profile in the sheet that comprises a body portion comprising a folded central region of the sheet and a first and further wing portion that each extend away from the body portion and terminate at a respective long edge of the sheet, and securing adjacent regions of the wing portions and/or opposed regions of the body portion together thereby providing a windable elongate tape element having laterally immobilised wing portions.

An object of the present disclosure is to provide an elbow-shaped duct manufacturing apparatus in which the height of a forming section is easily adjusted as a duct vane forming part has an up and down detachable structure.

An automatic formation device or an automatic formation system sets an equipment operation time from a required manufacturing time per product during the manufacturing of tubes having a round, polygonal, or oblong cross-section, wherein values are calculated from a product diameter (D), and a pitch (P), a product length (L) and a preset time (T) of a metal band plate to be wound, operations of respective components are controlled on the basis of the calculated values while the respective values are being controlled, and the metal band plate is held by a chuck that is disposed on the tip side of a winding core member and rotates in a synchronized manner so as to prevent loosening of the wound metal band plate by tightening/untightening the metal band plate as needed. Also, a rotation speed correction function for a motor system is added.

A method and a device for producing strip wound tube products are disclosed. According to the method, a winding machine winds a strip to produce a strip wound tube and a finishing machine cuts off pieces of desired length from the strip wound tube and connects strip layers in the end sections of the strip wound tube product by way of a joining operation. The finishing machine has a mobile operating head and/or a force decoupling unit.

A method of producing a carcass for a flexible pipe, the carcass and a flexible pipe with the carcass includes providing at least one first metallic strip a cover metallic strip. Shaping the first strip to have a profile with a first fold adapted to face towards the carcass axis and a second fold adapted to face away from the carcass axis. Pretreating an anchor width section of the cover strip including a weakening treatment of resistance against length extension and/or a length extension of the pretreated part of the anchor width section. Inserting the anchor width section of the cover strip into the first fold, ensuring that a cover width section of the cover strip extends beyond the second fold. Helically winding the first metallic strip and the cover strip, to provide that the first fold engages and interlocks with the second fold and that the cover width section covers a helical interstice between windings of the first metallic strip on the inner side of the carcass.